they are ok for making something a rolling frame but the blow out really quick which could make you wreck, and the bearings in them are horrible if you replace the tire. They are ok on something like a wagon are something. And for 5 dollars or what ever they are worth having them around. SO YES AND NO it depends if your going to run them with an engine. I have found about 10 in the garbage at tractor supply and harbor fright together, i don't know why they were being thrown away but they were in the dumpster so i got them.